Sökning: "isotopic exchange"

Visar resultat 1 - 5 av 18 avhandlingar innehållade orden isotopic exchange.

  1. 1. Transition Metal Mediated Transformations of Carboranes

    Författare :Ludvig Eriksson; Kalman Szabo; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; carborane; isoquinoline; PK11195; peripheral bensodiazepine receptor; Cu I Iodide; iodinated carborane; palladium; isotopic exchange; Herrmann’s Catalyst; Heck reaction; Suzuki-Miyaura reaction; cross coupling; arylation; olefination; 125-iodine; radiolabelling; carboraneboronic ester; BNCT; 2-iodo-; Kemi; Chemistry; Kemi; organisk kemi; Organic Chemistry;

    Sammanfattning : This thesis describes the use of copper and palladium to mediate transformations of carboranes, especially p-carborane.1-(1-p-carboranyl)-N-methyl-N-(2-butyl)-3-isoquinolinecarboxamide, a carborane containing analogue of the peripheral benzodiazepine receptor (PBR) ligand PK11195, has been synthesised. LÄS MER

  3. 2. Spill : Om djur, hantverk och nätverk i Mälarområdet under vikingatid och medeltid

    Författare :Johnny Karlsson; Jan Storå; Anders Andrén; Mats Roslund; Stockholms universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Craft; Osseous; Antler; Horn; Bone; Teeth; Walrus tusk; Elk; Red deer; Reindeer; Networks; Trade; Exchange; Birka; Sigtuna; Uppsala; Strängnäs; Nyköping; Viking; Medieval; Social Agency; Economic Agency; Archaeological Science; laborativ arkeologi;

    Sammanfattning : This thesis examines the use of various osseous raw materials in craft activities in the Mälaren region during the Middle Ages. Places studied are: Birka, Sigtuna, Nyköping, Strängnäs and Uppsala. The aim is to capture both chronological and spatial changes in the use of osseous raw materials. LÄS MER

  4. 3. Catalytic Properties of Protective Metal-Oxides

    Författare :Erik Hörnlund; KTH; []
    Nyckelord :isotopes; gas phase analysis; dissocation; isotopic exchange; high-temperature oxidation;

    Sammanfattning : .... LÄS MER

  5. 4. Numerical simulations of the isotopic composition of stratospheric water vapour and methane

    Författare :Martin Ridal; Cornelius Schiller; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; meteorologi; Meteorology;

    Sammanfattning : The middle atmosphere is an important area of the Earth's atmosphere, but our understanding of the dynamical and chemical processes in that region is still limited. Water vapour and methane both fulfil the requirements for tracers due to their long lifetimes and have frequently been used to study dynamical processes. LÄS MER

  7. 5. Time-resolved Structural and Mechanistic Studies of Water Oxidation in Photosystem II : water here, water there, water everywhere

    Författare :Casper de Lichtenberg; Johannes Messinger; Wolfgang P. Schröder; Holger Dau; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Oxygenic Photosynthesis; Photosystem II; TR-MIMS; isotope exchange; EPR; EDNMR; water splitting; water oxidation;

    Sammanfattning : Oxygenic photosynthesis is undisputedly one of the most important chemical processes for human life on earth as it not only fills the atmosphere with the oxygen that we need to breathe, but also sustains the accumulation of biomass, which is not only used as nourishment but is also present in almost every aspect of our lives as building material, textiles in clothes and furniture, or even as living decorations to name a few.The photosynthetic water-splitting mechanism is catalyzed by a water:plastoquinone oxido-reductase by the name of photosystem II (PSII), which is embedded in the thylakoid membranes of plants, algae and cyanobacteria. LÄS MER